Eight of the 16 films chosen for the dramatic competition are helmed by women.

The odds of getting into the Sundance Film Festival have been astronomical for years, but the statistic that jumps out from the dramatic competition lineup for January’s festival might be even more remarkable: In what festival programmers say is a Sundance first, fully half of the narrative features were made by women.

Culled from 1,227 submissions, the 16 dramas playing in the 2013 festival announced Wednesday cover a wide array of subjects and are populated by well-known actors (Casey Affleck, Daniel Radcliffe, Octavia Spencer, Jessica Biel) and complete unknowns. Many of the films, perhaps as a reflection of the gender of their directors, focus closely on personal, and often highly sexual, relationships.

“They are very much women’s stories,” said Trevor Groth, the festival’s programming director. In the 2012 festival, only three of the 16 dramatic competition films were made by women. According to San Diego State University’s Center for the Study of Women in Television and Film, only 5% of the 250 highest-grossing films last year were directed by women.

John Cooper, the festival director, said the quantity of women directors for 2013 was not intentional, although he was proud of the 50-50 split. “Every film has to stand on its own. You are just looking for original stories.”

Several of those women-driven stories are concerned with women seeking physical and emotional connections.

“I’m concerned with women’s concerns — I like telling intimate stories about women, about what they want and what they feel,” said Liz W. Garcia, a prominent television writer (“Cold Case,” “Memphis Beat”) who wrote and directed “The Lifeguard.” Garcia’s debut feature tracks a woman (Kristen Bell) who returns to her hometown and has a dangerous affair with a high school student. “I’m proud that my movie is very female,” Garcia said.

Stacie Passon wrote and directed “Concussion,” about a woman named Abby (Robin Weigert) who feels sexually abandoned in her marriage to another woman (Julie Fain Lawrence) and takes extreme steps to find companionship. Passon said that even with a lesbian relationship her film “is really about a mid-life crisis within a marriage.”

Running from Jan. 17 to 27 in Park City, Utah, Sundance is the nation’s top showcase for movies made outside the studio system. The 2012 festival launched “Beasts of the Southern Wild,” “The Sessions” and “Arbitrage,” all of which were directed by men, among other acclaimed independent productions that are considered likely awards season contenders.

Though many of the festival’s more prominent titles are found in its premiere section (those films, which are typically made by more established directors with bigger budgets, are announced Monday), the competition titles tend to define the festival’s personality.

“The filmmakers are delving into some very compelling relationship stories,” said Cooper. “But it’s coming from both female and male perspectives.”

The Sundance competition film with probably the most star-laden cast, “Ain’t Them Bodies Saints,” is writer-director David Lowery’s account of a fugitive (Affleck) trying to reunite with his wife (Rooney Mara). Lowery said that even with his high-profile actors (his cast includes Ben Foster and Keith Carradine) and Texas locations, he was trying to make “a very small film” about a couple’s bond. “I really wanted to tell a story that was exceedingly simple that didn’t have a lot of twists and turns,” Lowery said.

Two of the eight films helmed by women feature their directors (Lake Bell and Cherien Dabis) playing the lead roles. “The performances just come through as more connected and more authentic,” Cooper said. “But we’ve also seen it backfire on some people.”

In Bell’s feature debut, “In a World...,” she plays a voice-over artist whose father (Fred Melamed) is in the same profession and isn’t entirely welcoming of his daughter’s fledgling success. “His insecurity stands in the way of his being supportive of his daughter,” said Bell, whose short film “Worst Enemy” played at Sundance in 2011. “I’ve seen a lot of father-and-son competition, and I liked the fresh idea of giving the competition to the daughter.”